CN105088542B - A kind of high elongation rate polydactyl acid SMS composite nonwoven materials and preparation method - Google Patents

Abstract

The present invention relates to a kind of high elongation rate PLA SMS composite nonwoven materials and preparation method thereof, the material is made up of three-decker, and its upper and lower is polydactyl acid viscose non-woven material, and intermediate layer is polydactyl acid melt-blown non-woven material；The non-woven material surface density is 20 100g/m²Longitudinal direction strength is 40 150N/5cm, and longitudinal elongation at break rate is 60 130%, and laterally strength is 30 140N/5cm, transverse breakage elongation is 50 120%, and preparation, spun-bond process spinning, meltblown spinning and the SMS of preparation method including raw material are compound and the step such as reinforce.Non-woven material of the present invention is modified by polyamide elastomer to PLA, overcomes the big shortcoming of PLA fragility；The non-woven material surface density 20 100g/m2, longitudinal direction 40 150N/5cm of strength, longitudinal elongation at break rate 60 130%, 30 140N/5cm of horizontal strength, transverse breakage elongation 50 120%；The non-woven material has excellent mechanical property and biodegradability, can adapt to the requirement of medical and health and packaging material, can be widely used for the products such as diaper, sanitary napkin, operation dress, drape.

Description

A kind of high elongation rate polydactyl acid SMS composite nonwoven materials and preparation method

Technical field

The invention belongs to non-woven material field, be related to a kind of high elongation rate PLA SMS composite nonwoven materials and itsPreparation method.

Background technology

The appearance and its fast-developing life for significantly improving the mankind of 20 century synthesis high polymer material, synthesize high scoreSub- material is listed as four big pillars of Material Field with steel, timber and cement.But synthesis high polymer material is hugeProduction and consumption also generates two key subjects：Limited petroleum resources are by environment caused by a large amount of consumption and waste polymerPollution.These problems have caused the great attention in the whole world.21 century, many countries follow the resource for building sustainable developmentRing-like society is as one of state basic policy, and the environment-friendly biodegradated polymer materal of Devoting Major Efforts To Developing is worldwide flourishing emergingRise.

In numerous biodegradated polymer materals developed, PLA (PLA) is described as most potentialOne of kind.Being primarily due to PLA has fully biodegradable and using renewable resource as the plant origin of raw material, andIt is a kind of material of maintenance nature " carbon cycle balance ".So, PLA development and application can reduce polymeric scrap material pairThe white pollution of environment, saves petroleum resources, suppresses due to global greenhouse effect caused by the net discharge capacity increase of carbon dioxideAggravation.

The distinctive biodegradabilities of PLA cause its medical and health and packaging material field application prospect extremelyExtensively.And SMS composite nonwoven materials have stable preparation process, intensity height, adaptability good and the low advantage of cost, as doctorTreat one of important composition material of hygienic material and packaging material.

At present, the correlative study work of PLA SMS composite nonwoven materials is also less, is concentrated mainly on experimental researchStage, also have from large-scale production with a certain distance from, this is more crisp mainly due to PLA material performance, and elongation at break is low, general smallIn 5%.Therefore, even if SMS composite nonwoven materials are made, its elongation at break is again smaller than 15%, it is difficult to meet some medical treatmentThe requirement of hygienic material and packaging material to toughness and elongation.Chinese patent ZL201010163359.2 discloses a kind of high-fallPolylactic acid fiber SMS compound non-woven and its manufacture method, the Materials Fracture elongation manufactured by this method are maximum only up toTo 12%, it is impossible to realize high elongation rate, high tenacity.

The content of the invention

The purpose of the present invention is to overcome the defect of prior art there is provided a kind of high elongation rate, the polydactyl acid of high tenacitySMS composite nonwoven materials.

Realizing the technical scheme of the object of the invention is：A kind of high elongation rate polydactyl acid SMS composite nonwoven materials, shouldMaterial is made up of three-decker, and its upper and lower is polydactyl acid viscose non-woven material, and intermediate layer is polydactyl acidMelt-blown non-woven material；The non-woven material surface density is 20-100g/m², longitudinal direction strength is 40-150N/5cm, longitudinal fractureElongation is 60-130%, and laterally strength is 30-140N/5cm, and transverse breakage elongation is 50-120%.

Above-mentioned technical proposal, the PLA SMS composite nonwoven materials by polydactyl acid viscose non-woven material andPolydactyl acid viscose non-woven material is composited；The polydactyl acid viscose non-woven material fibre fineness is in 0.1-1mm, surface density is in 8-40g/m²；Described polydactyl acid melt-blown non-woven material fibre fineness is in 2-10 μm, surface density 4-20g/m²。

A kind of manufacture method of high elongation rate polydactyl acid SMS composite nonwoven materials, comprises the following steps：

A. by spunbond and be meltblown special polylactic acid slice and dried 12 hours at 100 DEG C respectively, by polyamide elastomer withThe PLA master batch of drying adds screw extruder melting extrusion at a temperature of 160-180 DEG C, and cooling granulation obtains spunbond and moltenDedicated modified polylactic acid slice is sprayed, wherein polyamide elastomer is 5-30 parts, and PLA is 70-95 parts；

B. spun-bond process spinning：It will enter in the dedicated modified polylactic acid slice feeding screw extruder of the spunbond obtained in step ARow melt spinning, 150-200 DEG C of spinning temperature, melt sprays from spinneret, cooled down through high velocity air through screw rod to filament spinning componentDrawing-off, finally by sub-wire lapping, obtains viscose non-woven material, spinning speed 200-1500m/min；

C. meltblown spinning：It will enter in the dedicated modified polylactic acid slice feeding screw extruder of the melt-blown obtained in step ARow melt-spraying spinning, spinning temperature is 150-220 DEG C, and melt sprays, through velocity heated gas through screw rod to filament spinning component from spinneretDrawing-off, is made melt-blown micro fibre, and forms melt-blown non-woven material, spinning speed 200-1500m/min on the reception device；

D.SMS is compound and reinforces：Step C spinning meltblown layers are carried out on the viscose non-woven material that step B is obtained, thenStep B spinning process is carried out again, SMS composite nonwoven materials are prepared, and finally resulting composite nonwoven material is carried outHot rolling is reinforced.

Above-mentioned technical proposal, melt index of the special polylactic acid slice of spunbond at 210 DEG C is 20-35g/10min,Fusing point is 160-180 DEG C.

Above-mentioned technical proposal, melt index of the special polylactic acid slice of melt-blown at 210 DEG C is 70-85g/10min,Fusing point is 160-170 DEG C.

Above-mentioned technical proposal, the polyamide elastomer is the copolymer that polyamide is constituted with PolyTHF.

Above-mentioned technical proposal, the weight average molecular weight that the copolymer contains polyamide portion is 530, and content is 22%；AltogetherThe weight average molecular weight that polymers contains PolyTHF part is 2000, and content is 78%.

After adopting the above technical scheme, the present invention has following positive effect：Non-woven material of the present invention passes through polyamidesAmine elastomer is modified to PLA, overcomes the big shortcoming of PLA fragility；Non-woven material surface density 20-100g/m2, longitudinal direction strength40-150N/5cm, longitudinal elongation at break rate 60-130%, horizontal strength 30-140N/5cm, transverse breakage elongation 50-120%；The non-woven material has excellent mechanical property and biodegradability, can adapt to medical and health and packagingThe requirement of material, can be widely used for the products such as diaper, sanitary napkin, operation dress, drape.

Brief description of the drawings

In order that present disclosure is easier to be clearly understood, it is right below according to specific embodiment and with reference to accompanying drawingThe present invention is described in further detail, wherein

Fig. 1 is high elongation rate PLA SMS composite nonwoven material preparation technology flows.

Embodiment

In order to deepen the understanding of the present invention, below in conjunction with embodiment, the invention will be further described, the embodimentIt is only used for explaining the present invention, is not intended to limit the scope of the present invention..

The present invention illustrates a kind of high elongation rate polydactyl acid SMS composite nonwoven materials and preparation method thereof, specificallyPreparation technology flow with reference to embodiment to the present invention as shown in figure 1, be explained in detail.

Embodiment one：

It is 35g/10min (210 DEG C) by melt index, the spunbond polylactic acid slice and melt index of 160 DEG C of fusing point are85g/10min (210 DEG C), 160 DEG C of special polylactic acid slices of melt-blown of fusing point are dried 12 hours at 100 DEG C respectively, by polyamideElastomer and the PLA master batch of drying add screw extruder melting extrusion at a temperature of 170 DEG C, and cooling granulation obtains spunbondWith the dedicated modified polylactic acid slice of melt-blown, wherein polyamide elastomer is 10 parts, and PLA is 90 parts.The dedicated modified poly- breast of spunbondSour 180 DEG C of slice spinning temperature, spinning speed 1000m/min；Dedicated modified polylactic acid slice spinning temperature is meltblown for 190 DEG C,Spinning speed 1000m/min, prepares SMS composite nonwoven materials, finally carries out hot rolling to resulting composite nonwoven materialReinforce.Obtained SMS composite nonwoven materials, non-woven material surface density 40g/m2, longitudinal strength 112N/5cm, longitudinal fractureElongation 93%, horizontal strength 104N/5cm, transverse breakage elongation 76%.

Embodiment two：

It is 30g/10min (210 DEG C) by melt index, the spunbond polylactic acid slice and melt index of 170 DEG C of fusing point are80g/10min (210 DEG C), 170 DEG C of special polylactic acid slices of melt-blown of fusing point are dried 12 hours at 100 DEG C respectively, by polyamideElastomer and the PLA master batch of drying add screw extruder melting extrusion at a temperature of 180 DEG C, and cooling granulation obtains spunbondWith the dedicated modified polylactic acid slice of melt-blown, wherein polyamide elastomer is 20 parts, and PLA is 80 parts.The dedicated modified poly- breast of spunbondSour 190 DEG C of slice spinning temperature, spinning speed 1100m/min；Dedicated modified polylactic acid slice spinning temperature is meltblown for 200 DEG C,Spinning speed 1100m/min, prepares SMS composite nonwoven materials, finally carries out hot rolling to resulting composite nonwoven materialReinforce.Obtained SMS composite nonwoven materials, non-woven material surface density 50g/m2, longitudinal strength 126N/5cm, longitudinal fractureElongation 86%, horizontal strength 113N/5cm, transverse breakage elongation 77%.

Embodiment three：

It is 25g/10min (210 DEG C) by melt index, the spunbond polylactic acid slice and melt index of 180 DEG C of fusing point are75g/10min (210 DEG C), 180 DEG C of special polylactic acid slices of melt-blown of fusing point are dried 12 hours at 100 DEG C respectively, by polyamideElastomer and the PLA master batch of drying add screw extruder melting extrusion at a temperature of 185 DEG C, and cooling granulation obtains spunbondWith the dedicated modified polylactic acid slice of melt-blown, wherein polyamide elastomer is 25 parts, and PLA is 75 parts.The dedicated modified poly- breast of spunbondSour 195 DEG C of slice spinning temperature, spinning speed 1200m/min；Dedicated modified polylactic acid slice spinning temperature is meltblown for 205 DEG C,Spinning speed 1200m/min, prepares SMS composite nonwoven materials, finally carries out hot rolling to resulting composite nonwoven materialReinforce.Obtained SMS composite nonwoven materials, non-woven material surface density 55g/m2, longitudinal strength 132N/5cm, longitudinal fractureElongation 79%, horizontal strength 124N/5cm, transverse breakage elongation 71%.

Melt index of the special polylactic acid slice of above example spunbond at 210 DEG C is 20-35g/10min, and fusing point is160-180 DEG C, it is 70-85g/10min to be meltblown melt index of the special polylactic acid slice at 210 DEG C, and fusing point is 160-170℃.The weight containing polyamide portion is equal in the copolymer that polyamide elastomer constitutes for polyamide with PolyTHF, copolymerMolecular weight is 530, and content is 22%；The weight average molecular weight that copolymer contains PolyTHF part is 2000, and content is 78%.

Particular embodiments described above, has been carried out further in detail to the purpose of the present invention, technical scheme and beneficial effectDescribe in detail it is bright, should be understood that the foregoing is only the present invention specific embodiment, be not intended to limit the invention, it is allWithin the spirit and principles in the present invention, any modification, equivalent substitution and improvements done etc., should be included in the guarantor of the present inventionWithin the scope of shield.

Claims (4)

1. a kind of high elongation rate polydactyl acid SMS composite nonwoven materials, it is characterised in that：The material is by three-decker groupInto its upper and lower is polydactyl acid viscose non-woven material, and intermediate layer is polydactyl acid melt-blown non-woven material；ShouldNon-woven material surface density is 20-100g/m², longitudinal direction strength is 40-150N/5cm, and longitudinal elongation at break rate is 60-130%,Laterally strength is 30-140N/5cm, and transverse breakage elongation is 50-120%；

The manufacture method of described high elongation rate polydactyl acid SMS composite nonwoven materials, comprises the following steps：

A. spunbond and the special polylactic acid slice of melt-blown are dried 12 hours at 100 DEG C respectively, by polyamide elastomer and dryingPLA master batch add screw extruder melting extrusion at a temperature of 160-180 DEG C, cooling granulation, obtains spunbond and melt-blown is specialCut into slices with polydactyl acid, wherein polyamide elastomer is 5-30 parts, PLA is 70-95 parts；

B. spun-bond process spinning：It will be melted in the dedicated modified polylactic acid slice feeding screw extruder of the spunbond obtained in step AMelt spinning, 150-200 DEG C of spinning temperature, melt sprays through screw rod to filament spinning component from spinneret, is led through high velocity air coolingStretch, finally by sub-wire lapping, obtain viscose non-woven material, spinning speed 200-1500m/min；

C. meltblown spinning：It will be melted in the dedicated modified polylactic acid slice feeding screw extruder of the melt-blown obtained in step ASpinning is sprayed, spinning temperature is 150-220 DEG C, and melt sprays from spinneret, led through velocity heated gas through screw rod to filament spinning componentStretch, melt-blown micro fibre is made, and form melt-blown non-woven material, spinning speed 200-1500m/min on the reception device；

D.SMS is compound and reinforces：Step C spinning meltblown layers are carried out on the viscose non-woven material that step B is obtained, are then entered againRow step B spinning process, prepares SMS composite nonwoven materials, finally carries out hot rolling to resulting composite nonwoven materialReinforce；

The polyamide elastomer is the copolymer that polyamide is constituted with PolyTHF, and the copolymer contains polyamide portionWeight average molecular weight be 530, content is 22%；The weight average molecular weight that copolymer contains PolyTHF part is 2000, contentFor 78%.

2. high elongation rate according to claim 1 is modified lactic acid SMS composite nonwoven materials, it is characterised in that：It is described poly-Lactic acid SMS composite nonwoven materials are combined by polydactyl acid viscose non-woven material and polydactyl acid melt-blown non-woven materialForm；The polydactyl acid viscose non-woven material fibre fineness is in 0.1-1mm, and surface density is in 8-40g/m²；Described changesProperty PLA melt-blown non-woven material fibre fineness is at 2-10 μm, surface density 4-20g/m²。

3. high elongation rate polydactyl acid SMS composite nonwoven materials according to claim 1, it is characterised in that：It is describedMelt index of the special polylactic acid slice of spunbond at 210 DEG C is 20-35g/10min, and fusing point is 160-180 DEG C.

4. high elongation rate polydactyl acid SMS composite nonwoven materials according to claim 1, it is characterised in that：It is describedMelt index of the special polylactic acid slice at 210 DEG C is meltblown for 70-85g/10min, fusing point is 160-170 DEG C.